An insult implying that a person has recently had oral sex with an unclean partner. Smegma, being most generally considered as affecting men, when associated with smelling it on the breath also implies homosexuality when this insult is directed at a male.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.